Fetch data for the home page community feed

[visortelle]

This is how the home page looks now:

There is an idea to provide a community feed to the home page.

• Decide which resource to use as a data source. r/haskell and discourse.haskell.org. Probably Reddit is the better option as it's more popular.
• Figure out the best way to fetch the data. It can be a request in a form of curl string with an example response. Plus instructions on how to get an API token if needed.
• Think about multiple data sources and the way to mix them or switch between them.

You don't need to implement the UI part. I'll integrate it and mark the commit as Co-authored-by you.